Question

युगपत समीकरण x + y = 20, 10x+5y = 140 है :-​

Answer 1

Answer:

x= 8 and y= 12

hope it will help u

Step-by-step explanation:

x + y = 20

or, x =20-y (equation 1)

10x + 5y= 140 ( equation 2)

or, 10(20-y) +5y = 140(putting the value of x)

or , 200- 10y + 5y=140

or, 200-5y=140

or, 200-140= 5y

or, 60 = 5y

or 60/5 = y

y = 12

Hence,

x= 20 - y

x =20 -12 ( putting the value of y)

x =8